Days between dates

Q: how many days are there in between these days ?

'29 sep 2016', '7 jul 2016', '28 apr 2016', '10 mar 2016', '14 jan 2016'

Solution:

from datetime import datetime,timedelta

a=map(lambda x: datetime.strptime(x,'%d %b %Y'),
      ['29 sep 2016', '7 jul 2016', '28 apr 2016', '10 mar 2016', '14 jan 2016'] ) 

def dr(ar):
    if len(ar)>1:
        print "{:%d %b %Y} .. {} .. {:%d %b %Y} ".format(
                            ar[0], (ar[0]-ar[1]).days, ar[1])
        dr(ar[1:]) 

Output:

dr(a) 

29 Sep 2016 .. 84 .. 07 Jul 2016 
07 Jul 2016 .. 70 .. 28 Apr 2016 
28 Apr 2016 .. 49 .. 10 Mar 2016 
10 Mar 2016 .. 56 .. 14 Jan 2016